.wh100p {    width: 100%;    height: 100%;}.flex {    display: flex;}.flex-1 {    flex: 1;}.flex-between {    @extend .flex;    justify-content: space-between;}.vertical-center {    @extend .flex;    justify-content: center;    align-items: center;}.flex-column {    @extend .flex;    flex-direction: column;}.base-container {    @extend .wh100p;}